CN106853505A - The casting method that ceramic sand inorganic binder and ceramic sand are recycled - Google Patents

The casting method that ceramic sand inorganic binder and ceramic sand are recycled Download PDF

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Publication number
CN106853505A
CN106853505A CN201710015255.9A CN201710015255A CN106853505A CN 106853505 A CN106853505 A CN 106853505A CN 201710015255 A CN201710015255 A CN 201710015255A CN 106853505 A CN106853505 A CN 106853505A
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China
Prior art keywords
sand
ceramic sand
casting
ceramic
recycled
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CN201710015255.9A
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Inventor
陈群
程楠
陈翠薇
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HENAN JINNAIYUAN NEW MATERIAL TECHNOLOGY Co Ltd
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HENAN JINNAIYUAN NEW MATERIAL TECHNOLOGY Co Ltd
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Priority to CN201710015255.9A priority Critical patent/CN106853505A/en
Publication of CN106853505A publication Critical patent/CN106853505A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C1/00Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
    • B22C1/16Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents
    • B22C1/18Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of inorganic agents
    • B22C1/186Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of inorganic agents contaming ammonium or metal silicates, silica sols
    • B22C1/188Alkali metal silicates
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C5/00Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C9/00Moulds or cores; Moulding processes
    • B22C9/10Cores; Manufacture or installation of cores

Abstract

The invention provides the casting method that a kind of ceramic sand inorganic binder and ceramic sand are recycled, it is related to Casting Technology field, including a kind of ceramic sand inorganic binder, the binding agent is main to be obtained by sodium silicate salt and modifying agent in autoclave, the inorganic binder is used by the compatibility with ceramic sand, solve existing casting method, loss to raw material is big, solid waste discharge amount is big, casting quality is unstable and during cast and sand removal, separates out the big problem of toxic gas, labour intensity.Simultaneously, the casting method recycled using the ceramic sand of the binding agent, ceramic sand can be recycled, reduce the labour intensity of production cost and the casting grinding cleaning of casting, pernicious gas low emission is realized during cast and sand removal, solid waste basically reaches zero-emission, improves the production work environment of casting.

Description

The casting method that ceramic sand inorganic binder and ceramic sand are recycled
Technical field
The present invention relates to Casting Technology field, followed more particularly, to a kind of ceramic sand inorganic binder and ceramic sand The casting method that ring is utilized.
Background technology
Casting industry is the basic industry of our national machine-building, but is also simultaneously a highly energy-consuming, maximum discharge, dirt high The severely afflicated area of dye.By taking steel-casting as an example, because of the characteristic of its multi-varieties and small-batch, still maintain in many producers and continue to use many decades Casting technique, the technological flexibility is strong but efficiency is low, big to the loss of raw material, and solid waste discharge amount is big, Er Qiezhu Part quality and quality is irregular seeks, it is unstable.In existing casting, alkalescent phenol resin moulding and sand regeneration work are generally used Skill, the discharge for having the solid waste more than 20% after the completion of casting.Meanwhile, resin sand is also have poison gas in casting process The important sources of body, particularly in cast and the sand removal Ministry of worker, the species of the toxic gas of precipitation is complex, processes very tired It is difficult.
The pollution problem of cast steel industry is main in formative technology, and the pollution source of formative technology is just in Modeling Material, such as What finds the formative technology solution of a good material and entirety, reaches green, the environmental protection even target of zero-emission, There is positive effect for solving the pollution problem of cast steel industry and the sustainable development of cast steel industry, while being also foundry enterprise The key issue of transition and upgrade.
Therefore, a set of casting model powder reusable edible is found out in research, and the low row of pernicious gas is realized in casting process Put, basically reach the casting method of solid waste zero-emission, be applied to cast steel industry formative technology total solution, to realize casting Green, environmentally friendly and zero-emission target, to China's foundary industry transition and upgrade, energy-saving and emission-reduction have the meaning of reality.
In view of this, it is special to propose the present invention.
The content of the invention
The first object of the present invention is to provide a kind of ceramic sand inorganic binder, and described inorganic binder is main by silicon This inorganic material of acid sodium-salt composition, with adhesive property it is strong, that consumption is few, the solidification up time is long and collapsibility performance is good etc. is excellent Point, the adhesive is used cooperatively with ceramic sand, and ceramic sand reusable edible is used in casting.
The second object of the present invention is to provide the casting method that a kind of ceramic sand is recycled, and the method is made by mulling Type, coating pour and knockout regeneration etc. step cast, the casting method ceramic sand can be recycled, and reduce casting Production cost, meanwhile, it passes through to carry out mulling and purely mechanic knockout regeneration method using inorganic bond and ceramic sand, And then pernicious gas low emission is reached, solid waste basically reaches the effect of zero-emission.
What the present invention was provided, a kind of ceramic sand inorganic binder, the inorganic binder is main by following percentage by weight Raw material be obtained in autoclave, sodium silicate salt 90~95% and modifying agent 5~10%:
Further, the main raw material by following percentage by weight of the inorganic binder is obtained in autoclave, silicic acid Sodium salt 93% and modifying agent 7%:
Further, the modifying agent is mainly made up of organic species and inorganic matter,
Wherein, the organic species include starch and resin;The inorganic matter includes graphite and slaine.
What the present invention was provided, the casting method that a kind of ceramic sand is recycled is comprised the following steps:
(1) mulling moulding, ceramic sand is sufficiently mixed with above-mentioned ceramic sand inorganic bond, is subsequently added curing agent and is made Type, is obtained core;
(2) coating is poured:Coating is coated on core, is then cast, shaped article is obtained;
(3) knockout regeneration:Shaped article knockout, the ceramic sand surface after knockout there is inorganic adhensive membrane, surface is had The ceramic sand of inorganic binder film carries out regeneration treatment, the regeneration ceramic sand for being recycled.
Further, step (1) ceramic sand is that refractoriness is more than 1800 DEG C, and thermal coefficient of expansion is less than 1.1m/K, by force Degree is more than 0.65MPa spherical ceramic sand.
Further, the weight ratio that step (1) ceramic sand mixes with ceramic sand inorganic bond is 100:2~3.
Further, step (1) curing agent is ethyl acetate.
Further, step (2) coating is grading of aggregates coating.
Further, step (3) the regeneration treatment is comprised the following steps:Ceramic sand after knockout is put into sand scouring Device, the inorganic binder film on ceramic sand surface is removed by the mutual friction of sand and sand, is then passed through to float and is risen dedusting, siphons away stripping Inorganic binder film and sieving remove micro mist, the regeneration ceramic sand for being recycled.
Further, methods described still further comprises step (4) regeneration screening, the regeneration for the recycling pottery that will be obtained The residual sodium content and circularity of porcelain sand are measured, and the pottery of corresponding casting technique requirement can not be reached to residual sodium content and circularity Porcelain sand, the knockout that repeats the above steps regeneration.
Compared with prior art, beneficial effects of the present invention are:
The ceramic sand inorganic binder that the present invention is provided, the binding agent is that modifying agent is added in sodium silicate salt, then right It carries out kettle, a kind of novel bonding agent material for being modified and being born, and the binding agent adhesive property is strong, consumption is few, can after solidification Use time is more than 72 hours;Collapsibility performance is good simultaneously, can reduce because of cleaning labour intensity caused by sintering, makes the ceramic sand can To recycle;Further, since it is mainly made up of this inorganic material of sodium silicate salt, therefore can during cast and sand removal To realize pernicious gas low emission.
The casting method that recycles of ceramic sand that the present invention is provided, poured by mulling moulding, coating and knockout again The step such as raw is cast, and due to being had using ceramic sand inorganic binder of the present invention, adhesive property is strong, consumption is few, solidification can make With the advantage that the time is long, a small amount of binding agent just energy uniform fold sand body surface need to be only added in mulling forming process, obtain good Good shaping and mold strength;Harmful gas emission is low during cast, and composition is single, meanwhile, ceramic sand Knockout regeneration step is purely mechanic regeneration method, and the ceramic sand after regeneration can be recycled, the regeneration rate of recovery of ceramic sand More than 99% is reached, there is no pernicious gas to produce and secondary emission waste during knockout regenerates, and then reach harmful Gas low emission, solid waste basically reaches zero-emission, and ceramic sand can be recycled the technique effect for reducing production cost, solves existing There is casting method, the loss to raw material is big, and solid waste discharge amount is big, and casting quality and quality are unstable, and cast With the sand removal Ministry of worker, the species of the toxic gas of precipitation is complex, processes very difficult problem.
Additionally, the casting method that the ceramic sand that the present invention is provided is recycled is easy to operate and safe, technology arrangement flexibly, can The time of the requirement adjustment knockout regeneration according to corresponding casting technique ensures to regenerate ceramic sand quality, can accomplish to stablize controllable Production.
Specific embodiment
Technical scheme is clearly and completely described below in conjunction with embodiment, it is clear that described reality It is a part of embodiment of the invention to apply example, rather than whole embodiments.Based on the embodiment in the present invention, the common skill in this area The every other embodiment that art personnel are obtained under the premise of creative work is not made, belongs to the model of present invention protection Enclose.
According to an aspect of the present invention, a kind of ceramic sand inorganic binder, the inorganic binder is main by following heavy The raw material for measuring percentage is obtained sodium silicate salt 90~95% and modifying agent 5~10% in autoclave.
In the present invention, sodium silicate salt is commonly called as sodium silicate, is a kind of water-soluble silicate, and its aqueous solution is commonly called as waterglass, is A kind of ore deposit binder, is widely used in casting industry.
In the present invention, ceramic sand inorganic binder is the material based on sodium silicate salt, by adding modifying agent, then Kettle, a kind of novel bonding agent material for being modified and being born are carried out to it, the binding agent adhesive property is strong, consumption is few, after solidification Up time is more than 72 hours;Collapsibility performance is good simultaneously, can reduce because of cleaning labour intensity caused by sintering;Additionally, by Mainly it is made up of this inorganic material of sodium silicate salt, therefore the low row of pernicious gas can be realized during cast and sand removal in it Put, beneficial to workman's production safety, and with curing agent reaction after there is hydrophobicity performance, it is ensured that sand mold data are steady during southern wet damp weather It is fixed.
In the preferred embodiment of the present invention, the main raw material by following percentage by weight of the inorganic binder It is obtained in autoclave, sodium silicate salt 93% and modifying agent 7%:
In the preferred embodiment of the present invention, the modifying agent is main by organic species and inorganic matter group Into, wherein, the organic species include starch and resin;The inorganic matter includes graphite and slaine.
According to an aspect of the present invention, the casting method that a kind of ceramic sand is recycled, comprises the following steps:
(1) mulling moulding, ceramic sand is sufficiently mixed with above-mentioned ceramic sand inorganic bond, is subsequently added curing agent and is made Type, is obtained core;
(2) coating is poured:Coating is coated on core, is then cast, shaped article is obtained;
(3) knockout regeneration:Shaped article knockout, the ceramic sand surface after knockout there is inorganic adhensive membrane, surface is had The ceramic sand of inorganic binder film carries out dry method mechanical friction regeneration treatment, the regeneration ceramic sand for being recycled.
Casting method of the present invention, poured by mulling moulding, coating and knockout regeneration etc. step cast, due to adopting Have the advantages that adhesive property is strong, consumption is few with ceramic sand inorganic binder of the present invention, the solidification up time it is long, mulling into A small amount of binding agent just energy uniform fold sand body surface need to be only added during type, good shaping and mold strength is obtained;Pouring Harmful gas emission is low during note, and composition is single, meanwhile, the knockout regeneration step of ceramic sand is purely mechanic regeneration Method, the ceramic sand after regeneration can recycle, and the regeneration rate of recovery of ceramic sand reaches more than 99%, in knockout regeneration During there is no pernicious gas to produce and secondary emission waste, and then reach pernicious gas low emission, solid waste basically reaches zero Discharge, ceramic sand can be recycled the technique effect for reducing production cost.
In the preferred embodiment of the present invention, step (1) ceramic sand is that refractoriness is more than 1800 DEG C, and heat is swollen Swollen coefficient is less than 1.1m/K, and intensity is more than 0.65MPa spherical ceramic sand.
It is above-mentioned preferred embodiment in, ceramic sand is spherical ceramic sand, and, close to straight circle, surface is smooth, without recessed for particle shape Convex vein line, therefore the refinement of obtained casting texture, casting quality are high, and it coordinates with ceramic sand inorganic binder of the present invention and makes With, mobility and Packing character are good, add a small amount of binding agent just can uniform fold sand body surface, obtain good shaping and mold be strong Degree, while collapsibility is good, it is easy to sand removal operation, binding agent usage amount has larger saving compared with other similar molding sand.Meanwhile, the pottery The porcelain sand coefficient of expansion is small, and casting will not produce expansion bug, and ceramic sand reuse performance is good, and sand treatment energy consumption is low, expense is low, sand The regeneration rate of recovery reach more than 99%, the rubbish of generation is few, and durability is high, reduces cost.
In the preferred embodiment of the present invention, step (1) ceramic sand mixes with ceramic sand inorganic bond Weight ratio be 100:2~3.
It is above-mentioned preferred embodiment in, the consumption of ceramic sand inorganic bond will lack compared with prior art, because through height Obtained adhesive flow and Packing character are good in pressure kettle, and ceramic sand of the present invention is spherical ceramic sand in addition, and surface is smooth, without recessed Convex vein line, therefore, the consumption of binder of prior art 50%, ceramic sand inorganic binder of the present invention need to be only added when both mix Just energy uniform fold sand body surface, obtains good shaping and mold strength
In the preferred embodiment of the present invention, step (1) curing agent is ethyl acetate.
It is above-mentioned preferred embodiment in, using ethyl acetate as curing agent, its firm time is short, hardening strength Height, molding firm time 10min-120min, whole intensity is more than 72 hours.
In the preferred embodiment of the present invention, step (2) coating is grading of aggregates coating.
It is above-mentioned preferred embodiment in, the permeable formation of the grading of aggregates coating is less than 3mm.
It is above-mentioned preferred embodiment in, the grading of aggregates coating for using selects low hair using alcohol-based solvent as carrier The aggregate that the compound binding agent of gas is equipped with rational gradation composition carries out system and matches somebody with somebody.Casting model surface is coated on during production and construction, by filling up, Shielding makes it to be formed between mo(U)ld face and steel liquid physics " barrier " together, completely cuts off, prevents mo(U)ld face and casting straight Contact, the purpose of infiltration is reduced so as to reach.
In the preferred embodiment of the present invention, ceramic sand regeneration treatment is comprised the following steps in the step (3): Ceramic sand after knockout is put into sand scouring device, the inorganic binder on ceramic sand surface is removed by the mutual friction of sand and sand Film, then passes through to float and rises dedusting, siphons away the inorganic binder film of stripping and micro mist is removed in sieving, the regeneration pottery for being recycled Porcelain sand.
It is above-mentioned preferred embodiment in, ceramic sand has that intensity is high, spherical, anti-wear performance is protruded and nothing of the present invention Collapsibility is good after machine binding agent mulling, the low advantage of retained strength, and common friction is produced by sand and sand and equipment, promotes Stick and be effectively peeled off with the glue residue of sand surface.
In the preferred embodiment of the present invention, methods described still further comprises step (4) regeneration screening, will To the regeneration ceramic sand that recycles determine residual sodium content and circularity, corresponding casting can not be reached to residual sodium content or circularity Make the ceramic sand of technological requirement, the regeneration of repeat step (3) knockout.
It is above-mentioned preferred embodiment in, it is inspection using sodium metasilicate as matrix class inorganic binder to determine residual sodium content Residue detection foundation.According to my company's long term test and data accumulation, for general cast casting, work as residual sodium<0.5% When, binding agent addition does not adjust.
Wherein, the assay method of residual sodium content is chemical titration, weighs 20g (being accurate to 0.01g) ceramic sand, is put into In the conical flask of 250ml, distilled water 100mL is added, 30 minutes are stood after being sufficiently stirred for, upper electric furnace low-temperature heat after 30 minutes To seething with excitement and being kept for 10 minutes, the drop of mixed indicator 8~10 is added after being cooled to room temperature, dripped with the hydrochloric acid standard solution of 0.2N Fixed, test solution is reddened as terminal by green, writes down the consumption mL numbers of hydrochloric acid solution, then calculates residual carbon content by formula.
It is above-mentioned preferred embodiment in, determine circularity be check ceramic sand rub regenerative process in damaged feelings Condition, when circularity index occur with>During 0.05~0.08 data fluctuations, display ceramic sand regeneration effect and impurity increase, together When sand damage accelerate.
The detection method and method of above-mentioned circularity are shown in《Spherical ceramic sand is used in casting》Machinery industry standard.
Embodiment 1
A kind of ceramic sand inorganic binder, the main raw material by following weight portion of the inorganic binder is through autoclave system :Sodium silicate salt 90%, change new agent 10%.
Embodiment 2
A kind of ceramic sand inorganic binder, the main raw material by following weight portion of the inorganic binder is through autoclave system :Sodium silicate salt 95%, change new agent 5%.
Embodiment 3
A kind of ceramic sand inorganic binder, the main raw material by following weight portion of the inorganic binder is through autoclave system :Sodium silicate salt 93%, change new agent 7%.
Embodiment 4
The casting method that a kind of ceramic sand is recycled, it is characterised in that comprise the following steps:
(1) mulling moulding, by the ceramic sand inorganic bond described in ceramic sand and embodiment 1 with 100:2 ratio is abundant Mixing, is subsequently added the vibrations moulding of ethyl acetate curing agent, and core is obtained;
(2) coating is poured:Grading of aggregates coating is coated on core, is then inserted in closing machine and is cast, shaping is obtained and produces Product;
(3) knockout regeneration:By shaped article knockout, the ceramic sand after knockout is put into sand scouring device, by sand and sand The inorganic binder film on ceramic sand surface is removed in mutually friction, then passes through to float and rises dedusting, siphons away the inorganic binder film of stripping And micro mist is removed in sieving, the regeneration ceramic sand for being recycled.
Embodiment 5
The casting method that a kind of ceramic sand is recycled, it is characterised in that comprise the following steps:
(1) mulling moulding, by the ceramic sand inorganic bond described in ceramic sand and embodiment 2 with 100:2 ratio is abundant Mixing, is subsequently added the vibrations moulding of ethyl acetate curing agent, and core is obtained;
(2) coating is poured:Grading of aggregates coating is coated on core, is then inserted in closing machine and is cast, shaping is obtained and produces Product;
(3) knockout regeneration:By shaped article knockout, the ceramic sand after knockout is put into sand scouring device, by sand and sand The inorganic binder film on ceramic sand surface is removed in mutually friction, then passes through to float and rises dedusting, siphons away the inorganic binder film of stripping And micro mist is removed in sieving, the regeneration ceramic sand for being recycled.
Embodiment 6
The casting method that a kind of ceramic sand is recycled, it is characterised in that comprise the following steps:
(1) mulling moulding, by the ceramic sand inorganic bond described in ceramic sand and embodiment 3 with 100:3 ratio is abundant Mixing, is subsequently added the vibrations moulding of ethyl acetate curing agent, and core is obtained;
(2) coating is poured:Grading of aggregates coating is coated on core, is then inserted in closing machine and is cast, shaping is obtained and produces Product;
(3) knockout regeneration:By shaped article knockout, the ceramic sand after knockout is put into sand scouring device, by sand and sand The inorganic binder film on ceramic sand surface is removed in mutually friction, then passes through to float and rises dedusting, siphons away the inorganic binder film of stripping And micro mist is removed in sieving, the regeneration ceramic sand for being recycled.
Comparative example 1
A kind of casting method, it is characterised in that comprise the following steps:
(1) mulling moulding, by silica sand and sodium silicate salt binding agent with 100:3 ratio is sufficiently mixed, and is subsequently added acetic acid Ethyl ester curing agent shakes moulding, and core is obtained;
(2) coating is poured:Grading of aggregates coating is coated on core, is then inserted in closing machine and is cast, shaping is obtained and produces Product;
(3) knockout regeneration:By shaped article knockout, there is a layer binder film on the silica sand surface after knockout, after knockout Silica sand is put into sand scouring device, and the adhensive membrane on drop surface is removed by the mutual friction of sand and sand, then passes through to float and rises dedusting, inhales Walk the adhensive membrane of stripping and micro mist is removed in sieving, obtain silica sand.
Effect assessment
To show the casting method that ceramic sand of the present invention is recycled, ceramic sand can be recycled, and then reach reduction The technique effect of the production cost of casting industry, by taking the casting method of embodiment 6 as an example, Reusability ceramic sand carries out 20 castings Make, then to regenerate ceramic sand residual sodium content and circularity be measured, as a result for:Residual carbon content is 0.39%, ceramic sand The fluctuation of circularity is 0.06, and the circularity of ceramic sand is consistent substantially.It follows that what ceramic sand of the present invention was recycled Casting method, after Reusability ceramic sand carries out 20 castings, can still reach good casting effect, with little need for Addition fresh sand, can significantly reduce the production cost of casting.
To show that casting method of the present invention has pernicious gas low emission, solid waste basically reaches zero-emission, and ceramic sand can be followed Ring carries out castings production using the casting method of embodiment 6 and comparative example 1 respectively using the technique effect for reducing production cost, 1 ton of sand proportion of goods damageds and binder additives of casting etc. are often then produced to above two casting method to be analyzed, and are as a result seen Following table:
From upper table analysis, 1 ton of casting is often produced, the sand loss of the ceramic sand of embodiment 6 is only 2%, almost not solid Give up and discharge, and the loss of the silica sand of prior art comparative example 1 is up to 20%, produces the solid waste discharge of 800kg, and in cast and clearly During sand, precipitation has the discharge amount of exhaust gas big, and poisonous, smell is dense.Further, since the profile of the silica sand of comparative example 1 is uneven, its life The quality of the casting of product is also more general.
In summary, the casting method that the ceramic sand that the present invention is provided is recycled, due to using inorganic in mulling moulding Adhesive and ceramic sand are mixed, therefore noxious gas emission is low during cast, and composition is single, ceramic sand Knockout regeneration step is purely mechanic regeneration method, does not have pernicious gas to produce and secondary emission waste during sand removal, And then pernicious gas low emission is reached, solid waste basically reaches zero-emission, and ceramic sand can be recycled the technology for reducing production cost Effect, solves existing casting method, and the loss to raw material is big, and solid waste discharge amount is big, and casting quality and quality are not Stabilization, and cast and the sand removal Ministry of worker, the species of the toxic gas of precipitation are complex, process very difficult problem.
Finally it should be noted that:Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations;To the greatest extent Pipe has been described in detail with reference to foregoing embodiments to the present invention, it will be understood by those within the art that:Its according to The technical scheme described in foregoing embodiments can so be modified, or which part or all technical characteristic are entered Row equivalent;And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology The scope of scheme.

Claims (10)

1. a kind of ceramic sand inorganic binder, it is characterised in that the main original by following percentage by weight of the inorganic binder Material is obtained in autoclave, sodium silicate salt 90~95% and modifying agent 5~10%,
2. ceramic sand inorganic binder according to claim 1, it is characterised in that the inorganic binder is main by following The raw material of percentage by weight is obtained in autoclave, sodium silicate salt 93% and modifying agent 7%.
3. ceramic sand inorganic binder according to claim 1 and 2, it is characterised in that the modifying agent is main by organic Class material and inorganic matter are constituted, wherein, the organic species include starch and resin;The inorganic matter includes stone Ink and slaine.
4. the casting method that a kind of ceramic sand is recycled, it is characterised in that comprise the following steps:
Step (1) mulling moulding, the ceramic sand inorganic bond described in ceramic sand and any one of claims 1 to 3 is fully mixed Close, be subsequently added curing agent moulding, core is obtained;
Step (2) coating is poured:Coating is coated on core, is then cast, shaped article is obtained;
Step (3) knockout regenerates:Shaped article knockout, the ceramic sand surface after knockout there is inorganic adhensive membrane, surface is had The ceramic sand of inorganic binder film carries out dry method mechanical friction regeneration treatment, the regeneration ceramic sand for being recycled.
5. the casting method that ceramic sand according to claim 4 is recycled, it is characterised in that step (1) ceramics Sand is that refractoriness is more than 1800 DEG C, and thermal coefficient of expansion is less than 1.1m/K, and intensity is more than 0.65MPa spherical ceramic sand.
6. the casting method that ceramic sand according to claim 4 is recycled, it is characterised in that step (1) ceramics The weight ratio that sand mixes with ceramic sand inorganic bond is 100:2~3.
7. the casting method that ceramic sand according to claim 4 is recycled, it is characterised in that step (1) solidification Agent is ethyl acetate.
8. the casting method that ceramic sand according to claim 4 is recycled, it is characterised in that step (2) coating It is grading of aggregates coating.
9. the casting method that ceramic sand according to claim 4 is recycled, it is characterised in that step (3) regeneration Treatment is comprised the following steps:Ceramic sand after knockout is put into sand scouring device, ceramic sand is removed by the mutual friction of sand and sand The inorganic binder film on surface, then passes through to float and rises dedusting, siphons away the inorganic binder film of stripping and micro mist is removed in sieving, obtains The regeneration ceramic sand for recycling.
10. the casting method that ceramic sand according to claim 4 is recycled, it is characterised in that methods described also enters Step includes step (4) regeneration screening, and the residual sodium content and circularity of the regeneration ceramic sand for recycling that will be obtained are measured, The ceramic sand of corresponding casting technique requirement, the regeneration of repeat step (3) knockout can not be reached to residual sodium content and circularity.
CN201710015255.9A 2017-01-09 2017-01-09 The casting method that ceramic sand inorganic binder and ceramic sand are recycled Pending CN106853505A (en)

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CN101259515A (en) * 2007-03-05 2008-09-10 上海市机械制造工艺研究所 CO2 hardened silicate-bonded sand additive agent and formative technology thereof
JP2010110802A (en) * 2008-11-10 2010-05-20 Ishikawa Prefecture Material for molding, functional agent, molded product and product
CN101941043A (en) * 2010-10-26 2011-01-12 河北科技大学 Water glass sand hardener
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Application publication date: 20170616